78881000 has 128 divisors (see below), whose sum is σ = 206219520. Its totient is φ = 28000000.

The previous prime is 78880999. The next prime is 78881009. The reversal of 78881000 is 18887.

It is a super-2 number, since 2×78881000² = 12444424322000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78881009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 780950 + ... + 781050.

It is an arithmetic number, because the mean of its divisors is an integer number (1611090).

Almost surely, 2^78881000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78881000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103109760).

78881000 is an abundant number, since it is smaller than the sum of its proper divisors (127338520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78881000 is a wasteful number, since it uses less digits than its factorization.

78881000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 78881000 is about 8881.4976214600. The cubic root of 78881000 is about 428.8684871719.

Adding to 78881000 its reverse (18887), we get a palindrome (78899887).

It can be divided in two parts, 7888 and 1000, that added together give a palindrome (8888).

The spelling of 78881000 in words is "seventy-eight million, eight hundred eighty-one thousand".